package org.apache.maven.repository.internal;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import java.io.File;
import java.util.ArrayList;
import java.util.Collection;
import java.util.LinkedHashSet;

import org.apache.maven.artifact.repository.metadata.Metadata;
import org.apache.maven.artifact.repository.metadata.Versioning;
import org.eclipse.aether.artifact.Artifact;
import org.eclipse.aether.artifact.ArtifactProperties;

/**
 * @author Benjamin Bentmann
 */
final class VersionsMetadata extends MavenMetadata {

  private final Artifact artifact;

  public VersionsMetadata(Artifact artifact) {
    super(createRepositoryMetadata(artifact), null);
    this.artifact = artifact;
  }

  public VersionsMetadata(Artifact artifact, File file) {
    super(createRepositoryMetadata(artifact), file);
    this.artifact = artifact;
  }

  private static Metadata createRepositoryMetadata(Artifact artifact) {
    Metadata metadata = new Metadata();
    metadata.setGroupId(artifact.getGroupId());
    metadata.setArtifactId(artifact.getArtifactId());

    Versioning versioning = new Versioning();
    versioning.addVersion(artifact.getBaseVersion());
    if (!artifact.isSnapshot()) {
      versioning.setRelease(artifact.getBaseVersion());
    }
    if ("maven-plugin".equals(artifact.getProperty(ArtifactProperties.TYPE, ""))) {
      versioning.setLatest(artifact.getBaseVersion());
    }

    metadata.setVersioning(versioning);

    return metadata;
  }

  @Override
  protected void merge(Metadata recessive) {
    Versioning versioning = metadata.getVersioning();
    versioning.updateTimestamp();

    if (recessive.getVersioning() != null) {
      if (versioning.getLatest() == null) {
        versioning.setLatest(recessive.getVersioning().getLatest());
      }
      if (versioning.getRelease() == null) {
        versioning.setRelease(recessive.getVersioning().getRelease());
      }

      Collection<String> versions = new LinkedHashSet<String>(recessive.getVersioning().getVersions());
      versions.addAll(versioning.getVersions());
      versioning.setVersions(new ArrayList<String>(versions));
    }
  }

  public Object getKey() {
    return getGroupId() + ':' + getArtifactId();
  }

  public static Object getKey(Artifact artifact) {
    return artifact.getGroupId() + ':' + artifact.getArtifactId();
  }

  public MavenMetadata setFile(File file) {
    return new VersionsMetadata(artifact, file);
  }

  public String getGroupId() {
    return artifact.getGroupId();
  }

  public String getArtifactId() {
    return artifact.getArtifactId();
  }

  public String getVersion() {
    return "";
  }

  public Nature getNature() {
    return artifact.isSnapshot() ? Nature.RELEASE_OR_SNAPSHOT : Nature.RELEASE;
  }

}
